This Samyang lens has a maximum focal length of 35 mm and a minimum focusing distance of 0.3 m. Your filters need to have a diameter of 77 mm to fit this lens.
From Photospecialist
Samyang VDSLR 35mm T1.5 MK2 Fuji X
DigiBroadcast
Samyang Vdslr 35mm T1.5 Mk2 Fuji x